Improved machine for making coiled springs



J. HARRISON, Jr. r MACHINE FOR MAKING GOILED SPRINGS. N'0. 16,483. Patented Janpzv, 185% UNITED STATES JAMES rannison', an.

IMPROVED MACHINE FOR- MAKING C'OlLED saamcs.

PATENT ()Fnrcn.

, on NEW YORK, N. Y.

Specification forming part ot' Letters Patent Nth 16,483, dated January-27,1957; H I

Toull whom it may concern.-

Be it known thatl, JAMES HARRISON, J r., of the city, county, and State of How York, have invented a new and useful Improvement in Machinery for Making Coiled Springs for Upholstery and other Purposes; and I do hereby dec'zare that the following is a full,

clear, andexact description of the same, reference being bad to the accompanying-drawings, forming part of this specification, 1n

Figure 1 is a side elevation of a machine constructed according to my invention. Fig. 2 isa plan of the same. Fig.3 is a transverse vertical section of the same in the line .r .r of Fig. 1.

Similar letters of reference indicate corresponding parts in the several figures.

This invention consists'in a egg-taint arrangeanjcnt of rollers, applied and operating as here :inaitcrdescribed, in connection with a mandrel whose form is that of a single cone, to

. gproducc double conical coiled springs-such as v ards B l and carrying the bearings S S fora horizontal shaft, (3, atone end of which there is formed or secured the mandrel D, whose form is that of a truncated cone.

l is an adjustable bed supported on two springs, an, and a third spring, 0, that rest on the stationary bed A under the mandrel l).

b.b-are screws passing loosely through cars (l (l on the sides of the stationary bed A, and screwing into the adjustable bed 1'], said screws being furnished with heads at the bottom to prevent the zuljustable'bcd being raised above a certain-heightby the springs a (1.

Yea are screws screwing through the ears (Z d,

and standing above the face of the stationary l 7 .bed A, to serve as stops to preventthe descent rice for converting continuous rotary-into re of the adjustable bedE beyondaeertain distance, and is another screw-screwing through an ear, (2*, on the stationary'bed, for the same purpose. 1 .1

F is aearriage fitted to travel on the adjustable bed E in a direction parallel with a vertical plane passing through the center of the mandrel D, said carriage supporting the bearings G G of two rollers, g y, whose duty is to confine the wire from which the springs are to be made in contact with the mandrel 1), said rollers being properlygrooved in their peripheries'to receive the wire. The springs a upholding up the adjustable carriage, cause the rollers g 9: to press the wire firmlyagainst the surface of the mandrel.

The bearings G G of the rollersare secured to thecarriage F by means of screws -f fppassii ig through slotswhich allows thiltmtqshead.

justed to bring the rollers to an inclination to the axis of the. conical mandrel, to correspond with the helical form to begiven to the spring, and also allows them to be adjusted in such relation to each other that the wire, in passing from one roller to the other in contact] with the conical mandrel, will have the re quired inclination.

j on the adjustable bed E. The adj ustable bed His set. at such an inclination that the 81? riage F, in moving along it, will cause the rollers g g to move as nearly as'possible in lines parallel with the nearest longitudinal profile lines of the conicalsuri'acc of the mandrel, that part of the stationary bed over which the adjust able bed is placed having about the sa ne inclination; but the springs a a under the ad justable bed will allow the rollers to accommodate t-hemselves exactly to the-profile of the mandrel and to thevaryirig diameter thereof.

ll is a connecting-link, by which the-carriage F is connected with a bar, I, that is fitted to slide longitudinally parallel with the axis of the shaft 0 in guides attached to the stationary bed A.

J is a double screw whose threads cross each other on the shaft C, and K is a fork at inched to the sliding bar I and eugagingwith the double-threaded screw on the shaft. This screw and fork constitute a well-known de- The bearings G G are each adjusted and kept inpla-ce by means of. three screws, i 13 1', working through lugs jj @g", which operates in rollers 1 g, to confine the wire to the surfaceciprocating rectilinear motion, and serve to i1npart motion from the shaft (J to the bar'l to move the'rollers g 1/ along the 121cc of the conical mandrel.

' L- is abarworking through guides 70 k, at-' tached to the bearingsSS, in. a direction par.- allel with the nearestlongitndinal'profile line of the conical mandrel and carryinga'roller, the same manner as the of the conical mandrel, the said roller! being set in such relation to therollelf 9 {1' as to cause the wire, in passing from them to it, to produce the desired helical form. The bar- L hasa grooved collar, -Z, keyed to it,w'hich is embraced by a fork, m, attached by a joint to the sliding-bar I, so as to cause the roller to travel along the face of the cone simulta- 'The operation of the machine is a-s follows! The wire,'which is represented in red color-in the'several figures, has its end introduced between themandrel and the rollersg g g,- as 7 1S shown in Fig-.- 3,-and one continuous rotary motion being imparted to the shaft (3 in the proper direction, which, to correspond withthe'direction of the inclination of'the rollers g g 9", must be in the direction of the arrow revolving mandrel, andthe wirelieing drawn between the rollersa n'd them andrel, b y thefric= tion of the rough suri'z rce of the mandrel, causes the rollers to revolve and conduct the wire witli very. little friction around the nnnidrel,

causing the wire to keep .moving spirally to-j ward the nose of the mandrel. The movement of thc'rollers longitudinally to. the mandrel causes every portion of the'wire to asshown in'Fig the rollers 1/ 1/ all receive a motion back and forth alcs'ig the face ol'lhe same the circular form of that-portion of the l mandrel in contact with which it passes in moving from the first roller, g, to the third, g,

and hence, 'as the rollers move from the nose or truncated end'of the mandrel towardthe base, the diameter of thespiral being formed .1

is constantly increasing, and as the rollers move in the "opposite direction the said. di ainete'r'is- 'di mmishing, thus causing 1hr s n rally-wound-"wiiet to assume the form of a seriesbftruneatd clOnes, each being united atg-its base and trunaated end with the liase and truncated en'd'ofifl cnext ones ontilher side of' it, each two united cones, eriqlie ug The Open whole of a piece-0f wire of: anylength win;-

gseparatcd froni,tl1e'otl|e1s,at their has-2s, coir I vstituting a double conical spring. alien will continue-in this manner till. the

ever is formed in -to, sprin gs without any stop- .livered from the 'n achine bythe movement the wirereceives in being coiled and formed. By arranging a sheet-iron tube inline with the-mandrelto receive the eoiledwire asit-is' .deli'veredover the nose of the mandrel, and giving the said .tube a rotarymot-ion. in the.

mandrel, the wire is easedofif themand'rel and a more perfect springisxproduced.

machine in a connected state; but by a prop erly arranged cutter f properly placed oppositeqthe largest portion of the mandrel on which the wire'is jc'oiled Qthe' springs 'inayhe. cnt-soii'as-fast .asthey arecompleted.: Ifa guide be arrangedto.-cond u'et the wire to the first roller and the grooves of the rollers he. made a little wider. than the thickness of the. wire, the pitch of the spiral maybe varied to alce'rta'in extent by moving the guide sidewise.

The diameter of the springs maybe in creased or diminished byfchan'ging thecon necting-rod 11, that connects the carriage-F with the sliding barl, for a longer'orshorter one, or by some provision for. shortening or lengthening the said rod, andat the same time moving the collar ton'the'xbar L,..'so as to throw the rollers altogether nearer to'the base- -or to the nose-of theeonical mandrel, and thereby causing the spring-to be formed on a larger orsinaller portion of the mandrel,v This allows the same machine to be used for springs of'variens sizes. V 3 1 I will here remark'thatit may be p ractim.,- ble to givethe mandrel a'longitudinal movement relatively to the rollers, instead of moving the rollers longitudinally to-thei mandrel, as dcscri lied, and though l do not contemplate usiiigzsucli an arrangement I regard it as oquivr-rlent to the arrangement described. The shaft is represented witha mandrel, D, at the opposite end to Dfandbyeomhining witlri this mandrel a series of -rol1ers,g g"-g%, and other appendages like those ope rating i-n combination with D the machinewill form two springs at a'ti-me'. i The process of forming'springs by this machine differs very materially from the common process of forming them onthe block, as

the spring, instead ofremaining in contact wil h the surface on which itisformed, is contionally moving away. It also difiers from the process of forming them by carrying the wire between rollers into vontaet'with its inclined plane. "Both. of those other processest fid to open any flaws in the wire and stretch the outer side of it in the bend,-While the proas performed by this machine'tends to cdmpress thewire and close up all flaws and other imperfections in the wire.

" What I claim as myfinvention,'anddesireio secure by Letters Patent, .is..'

- 1. The combination of a revolving mandrel,

' n: and two or m'ore' grooved rollers, arranged page of the machine, the springs being 'desame direction as, but aplittle faster, thanthe The springs are delivered from the described.

16,463 V r v i. W I H 3. I

"13416 Qpmting together in any nmmerQ Siipi the rollers t o aeeommodate their movements 'jfit-mlt-lafly as described,=tbr the purpose sep exactly to the longitudinal profile and vary- 2. The employment of an adjust-able spring ing their prjoper operation. :Eng bed, F. to support the roller-carnage 1",

JAS. HARRISON, JR. .01 otherwise, in an equivalent manner, ape. \Vit-IIQSSCS:

piying springs under or at the. back of' the JVC'DUSUH', mum-carriage, for the nn-pose 01' enabling S. F. Colin-1N.

I il'zg diameter of the mandrel, and thus insnr- 

